Book Image

Learning Ext JS

By : Colin Ramsay, Shea Frederick, Steve 'Cutter' Blades
Book Image

Learning Ext JS

By: Colin Ramsay, Shea Frederick, Steve 'Cutter' Blades

Overview of this book

<p>As more and more of our work is done through a web browser, and more businesses build web rather than desktop applications, users want web applications that look and feel like desktop applications. Ext JS is a JavaScript library that makes it (relatively) easy to create desktop-style user interfaces in a web application, including multiple windows, toolbars, drop-down menus, dialog boxes, and much more. Both Commercial and Open Source licenses are available for Ext JS.<br /><br />Ext JS has the unique advantage of being the only client-side UI library that also works as an application development library. Learning Ext JS will help you create rich, dynamic, and AJAX-enabled web applications that look good and perform beyond the expectations of your users.<br /><br />From the building blocks of the application layout, to complex dynamic Grids and Forms, this book will guide you through the basics of using Ext JS, giving you the knowledge required to create rich user experiences beyond typical web interfaces. It will also provide you with the tools you need to use AJAX, by consuming server-side data directly into the many interfaces of the Ext JS component library.</p>
Table of Contents (16 chapters)
15
Index

The roots

Although we've demonstrated a number of powerful techniques using the Ext tree support, its real strength lies in the wealth of settings, methods, and hook points that the various classes expose. We've already reviewed a number of ways of configuring the TreePanel and TreeNode classes, which give access to a number of powerful features. However, there are more configuration options that can be used to tweak and enhance your tree, and we're going to review some of the more interesting ones now.

TreePanel tweaks

By default, there are a number of graphical enhancements enabled for the TreePanel which, depending on your application requirements, may not be desirable. For example, setting animate to false will prevent the smooth animated effect being used for the expansion and contraction of nodes. This can be particularly useful in situations where nodes will be repeatedly expanded and collapsed by a user and slower animated transitions can be frustrating.

Because TreePanel...